Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ontario to Washington from C$ 210

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
30 Aug — 6 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2026.

Sat 29/87:15 a.m.
YUL
-
PDX
1 stop9h 35m
WestJet
Sat 12/92:30 p.m.
PDX
-
YUL
2 stops30h 55m
WestJet
Deal found 31/7C$ 389
Tue 1/97:15 a.m.
YUL
-
PDX
1 stop9h 35m
WestJet
Thu 10/92:30 p.m.
PDX
-
YUL
1 stop13h 35m
WestJet
Deal found 31/7C$ 396
Sat 7/117:30 a.m.
YUL
-
PDX
1 stop10h 11m
Air Canada
Tue 10/1110:00 a.m.
PDX
-
YUL
2 stops10h 18m
Air Canada
Deal found 30/7C$ 413
Sat 22/86:00 a.m.
YUL
-
PDX
1 stop19h 03m
United Airlines
Sat 5/911:18 p.m.
PDX
-
YUL
1 stop10h 51m
United Airlines
Deal found 31/7C$ 414
Sat 17/107:30 a.m.
YUL
-
PDX
1 stop10h 21m
Air Canada
Mon 19/107:45 p.m.
PDX
-
YUL
1 stop8h 25m
Air Canada
Deal found 28/7C$ 417
Tue 13/106:35 p.m.
YUL
-
PDX
1 stop18h 40m
United Airlines
Sat 17/102:27 p.m.
PDX
-
YUL
1 stop17h 13m
United Airlines
Deal found 28/7C$ 420
Sat 29/86:10 a.m.
YUL
-
PDX
1 stop8h 18m
United Airlines
Sat 5/911:02 p.m.
PDX
-
YUL
1 stop8h 38m
United Airlines
Deal found 30/7C$ 421
Sat 22/85:35 p.m.
YUL
-
PDX
1 stop20h 59m
American Airlines
Sat 29/810:05 p.m.
PDX
-
YUL
1 stop11h 43m
American Airlines
Deal found 31/7C$ 424
Tue 25/812:47 p.m.
YUL
-
PDX
2 stops14h 09m
Delta
Sat 12/96:00 a.m.
PDX
-
YUL
2 stops14h 50m
Delta
Deal found 29/7C$ 425
Thu 29/105:55 p.m.
YYZ
-
PDX
1 stop7h 32m
United Airlines
Mon 2/115:36 a.m.
PDX
-
YYZ
1 stop7h 32m
United Airlines
Deal found 29/7C$ 436
Thu 10/129:30 a.m.
YYZ
-
PDX
1 stop14h 51m
United Airlines
Sat 2/111:34 p.m.
PDX
-
YYZ
1 stop9h 14m
United Airlines
Deal found 29/7C$ 439
Thu 10/92:45 p.m.
YYZ
-
PDX
1 stop7h 33m
United Airlines
Mon 21/911:02 p.m.
PDX
-
YYZ
1 stop7h 52m
United Airlines
Deal found 30/7C$ 442

Find flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated 31 July 2026.

Round-trip from

C$ 396

One-way from

C$ 210

Popular in

June

Cheapest in

February

Average price

C$ 608

Good round-trip deal

C$ 784 or less

Good one-way deal

C$ 374 or less
WestJet
  • WestJet
  • 1/9-10/9
  • 2 total stops
  • 23h 10m total
  • Ontario to Washington
Search Deals
WestJet
  • WestJet
  • 5/9
  • 1 total stop
  • 9h 35m total
  • Ontario to Washington
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Washington.
Search Deals
Price to beat on a one-way flight from Ontario to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 31 July 2026.
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

6:00 a.m.-10:03 p.m.

1 stop19h 03m

Portland

Sat 12/9

7:27 p.m.-8:16 a.m.

1 stop9h 49m

C$ 420

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

12:47 p.m.-11:56 p.m.

2 stops14h 09m

Portland

Sat 12/9

6:00 a.m.-11:50 p.m.

2 stops14h 50m

C$ 425

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:00 a.m.-10:03 p.m.

1 stop19h 03m

Portland

Sat 5/9

11:18 p.m.-4:10 p.m.

1 stop13h 52m

C$ 425

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

9:45 a.m.-9:10 p.m.

2 stops14h 25m

Portland

Sat 17/10

5:00 a.m.-10:06 p.m.

2 stops14h 06m

C$ 425

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

6:00 a.m.-9:05 p.m.

2 stops18h 05m

Portland

Tue 29/9

5:00 a.m.-9:26 p.m.

2 stops13h 26m

C$ 425

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:00 a.m.-5:14 p.m.

2 stops14h 14m

Portland

Sat 5/9

6:45 a.m.-11:30 p.m.

2 stops13h 45m

C$ 428

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

9:15 a.m.-8:10 p.m.

1 stop13h 55m

Portland

Fri 9/10

10:33 p.m.-4:10 p.m.

1 stop14h 37m

C$ 432

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

11:23 a.m.-9:05 p.m.

2 stops12h 42m

Portland

Wed 9/9

5:00 a.m.-10:06 p.m.

2 stops14h 06m

C$ 435

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:00 a.m.-10:03 p.m.

1 stop19h 03m

Portland

Sat 5/9

7:45 p.m.-6:15 a.m.

1 stop7h 30m

C$ 436

TorontoPortland

YYZ - PDX

YYZPDX

Toronto Pearson Intl

Fri 21/8

2:24 p.m.-10:09 p.m.

1 stop10h 45m

Portland

Fri 4/9

6:00 a.m.-6:34 p.m.

1 stop9h 34m

C$ 446

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Ontario to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 358). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to WA?

Find hourly flight availability from Ontario to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 July 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to State of Washington as you normally would.

Weekly flight availability from Region of Ontario to State of Washington

Explore weekly flight availability from Ontario to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 31 July 2026.

The most flights from CAON to USWA are scheduled on a Monday (4 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Region of Ontario to State of Washington?

Airfare is below average for this route at the moment.
Region of Ontario to State of Washington flights typically cost between C$ 490 and C$ 888 in October.
The cheapest round-trip price found within the last 5 days was C$ 478 on WestJet (2 Oct-12 Oct).

How far ahead should I book a flight from Region of Ontario to State of Washington?

The price you pay for your flight from Region of Ontario to State of Washington may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 31 July 2026.
Check out reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Ontario to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,742 reviews
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Delta
7.8
Good
8,494 reviews
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
United Airlines
7.4
Good
10,056 reviews
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
WestJet
7.2
Good
3,420 reviews
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Air Canada
7.1
Good
11,415 reviews
Alaska Airlines
7.9
Good
12,742 reviews
Check prices

Crew

8.5

Food

7.0

Entertainment

7.0

Overall

7.9

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to State of Washington?

    For as low as C$ 466, United Airlines can have you in State of Washington from Region of Ontario in 10h 03m. Region of Ontario and State of Washington are separated by a distance of 3383 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to State of Washington one-way?

    C$ 123 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 153 and C$ 166, respectively.

  • Can I find deals for flights from Ontario to Washington that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington.

  • Can I find deals for business class flights from Ontario to Washington?

    Yes. Cheapflights offers flight deals from Ontario to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to State of Washington?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 358). Flying from Region of Ontario to State of Washington in June is currently the most expensive (average of C$ 651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to LaGuardia flights
Pearson Intl to John F Kennedy Intl flights
Vancouver Intl to Los Angeles flights
Pearson Intl to Fort Lauderdale flights
Toronto Island to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Newark flights
Pierre Elliott Trudeau Intl to Miami flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Toronto Island to LaGuardia flights
Pearson Intl to Los Angeles flights
Pearson Intl to Orlando flights
Vancouver Intl to Las Vegas flights
Pearson Intl to Las Vegas flights
Hamilton to Newark flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Miami flights
Vancouver Intl to San Francisco flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to San Francisco flights
Pearson Intl to O'Hare Intl flights
Vancouver Intl to Newark flights
Vancouver Intl to John F Kennedy Intl flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to Reagan-National flights
Pearson Intl to Dulles Intl flights
Vancouver Intl to Honolulu flights
Pearson Intl to Seattle flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Toronto Island to Fort Lauderdale flights
Vancouver Intl to Ontario flights
Toronto Island to Orlando flights
Vancouver Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Abbotsford to Los Angeles flights
Vancouver Intl to LaGuardia flights
Pearson Intl to Hobby flights
Pearson Intl to Boston flights
Pierre Elliott Trudeau Intl to Orlando flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Nashville flights
Pearson Intl to Atlanta flights
Pearson Intl to George Bush Intcntl flights
Toronto Island to Dulles Intl flights
Toronto Island to O'Hare Intl flights
Toronto Island to Boston flights
Pearson Intl to Midway flights
Calgary to Las Vegas flights
Toronto Island to Las Vegas flights

Top 5 airlines flying from Ontario to Washington

Discover the top 5 airlines that operate flights from Ontario to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 31 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 227AverageC$ 723FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 254AverageC$ 622FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 255AverageC$ 677FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapestC$ 273AverageC$ 656FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 274AverageC$ 482FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Washington. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Ontario.

Can Cheapflights find flights from Ontario to Washington with no change fees?

Need flexible booking options for your flight to Washington from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Washington become cheaper?

Of course! You can now track prices for flights from Ontario to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.